A combined -type vibrotactile displayed with a horizontal fin actuator array and a vertical pin actuator array is stimulated. The former uses piezoelectric element to stimulate transverse vibration and the latter uses electromagnetic vibration exciter to stimulate longitudinal vibration, respectively. These two stimulation methods are uncoupled. This display can realize the representation of touch sense of various surface textures through the combination and control of vibration direction, amplitude and frequency of the vibrators. Surface roughness representation is researched by using this display, and the theory of grey color theory is introduced. The transverse vibration in the fin array is applied to stimulate the sense of smooth, and the longitudinal vibration in the pin array is used to stimulate the sense of roughness. These two types of vibration are interweaved together to produce some specific tactile sensations of surface roughness. The mechanical parameters quantification experiment test and the mental experiment both verify that this combination of various vibration modes of slices and needles is effective to the representation of various roughness textures.